‘Who Killed Cock Robin?’ is a musical mystery very loosely based on the nursery rhyme of the same name. Its source material notwithstanding, ‘Who Killed Cock Robin’ is the most adult Silly Symphony ever made.

True to the Silly symphony concept, all characters either sing or speak in rhyme to Frank Churchill’s music (with Jenny Wren’s sensual blues as a highlight), but in a bare seven minutes the cartoon manages to mock both the law, racialism and gay people, while displaying an unusual eroticism through Jenny Wren, who is a very fine caricature of famous Hollywood actress Mae West, a tour de force by Joe Grant (design) and Hamilton Luske (animation).

These features are especially striking when one bears in mind that the Hays Code was already active in 1935. Due to his self-censorship of the movie industry sex and violence were banned from the movies. To illustrate its effect: due to this code an erotic cartoon character like Betty Boop had to be tuned down and was turned into a goody-goody and quite a bland character. Yet, ‘Who Killed Cock Robin’ displays its satire and eroticism in full glory.

When Cock Robin has been shot by a mysterious shadow, the Keystone Cop-like police randomly arrests some bystanders: a tough-looking guy, a black bird (in those days blacks were easily arrested just because of their color) and a cuckoo who resembles Harpo Marx. They’re treated very roughly, being knocked by the cops almost all the time. And when Jenny exclaims that justice should be done, the judge simply orders to hang all verdicts even though nobody knows who’s guilty!

It’s Cupid, an obvious caricature of a homosexual, who prevents this cruel sentence. Cock Robin appears to be alive, and finally he and Jenny Wren reunite in a hot kiss. Thus ends one of the most spectacular cartoons of the 1930s.